I AM ONE OF THE WORLDS BIGGEST LOVER OF ALL ANIMALS. I WANT YOU (?) TO KNOW THAT MICE FEEL PHYSICAL PAIN JUST LIKE ALL CREATURES. IT WAS CRUEL TO VIDEO ONE BEING TORTURED BY A CAT. I FIND IT VERY SAD AND OFFENSIVE.

Actually, bettie, invertebrates are incapable of feeling pain (at least as we understand it) because they lack the nociceptors (pain receptors) that vertebrates have. That’s not to say that they can’t feel other sensations like heat or pressure, they just can’t feel pain.